Dendrobium Buttercup

[dbarron]

In Sept 2020, I purchased from an ebay seller, Dendrobium Buttercup. At the time, I assumed it was a biggibum hybrid (due to shape of the flower). I was wondering why it hasn't flowered yet and recently looked it up and found it's a primary hybrid of (signatum (50%) x polyanthum (25%) x nobile (25%)). Assumptions...bad things.
Anyway, has anyone flowered this or a similar hybrid? In my conditions, it has almost matted across the 4 inch pot, but still has a year or maybe two growing space because it's only 3 inches or so high. It looks very healthy and the newest growths are just a bit bigger than the previous ones. I have not observed any dormant season, it does not lose leaves (though from ancestry it should likely be deciduous).
Once I finally looked up the ancestry, I wondered if I should be reducing water more. I do reduce water a bit as it gets colder and darker, but not that much.
Household temps, southern window (no sunburn), light fertilization. Wlsonara and dendrobium biggibum hybrid flowering beside it.
Thoughts? I mean wait another year and see what happens?